how to force run unit tests when running git push 3f

1#!/bin/bash
2while read oldrev newrev refname
3do
4    # Only run this script for the master branch. You can remove this 
5    # if block if you wish to run it for others as well.
6    if [[ $refname = "refs/heads/master" ]] ; then
7        # Anything echo'd will show up in the console for the person 
8        # who's doing a push
9        echo "Preparing to run phpunit for $newrev ... "
10 
11        # Since the repo is bare, we need to put the actual files someplace, 
12        # so we use the temp dir we chose earlier
13        git archive $newrev | tar -x -C /home/jani/tmp/example
14 
15        echo "Running phpunit for $newrev ... "
16 
17        # This part is the actual code which is used to run our tests
18        # In my case, the phpunit testsuite resides in the tests directory, so go there
19        cd /home/jani/tmp/example/tests       
20 
21        # And execute the testsuite, while ignoring any output
22        phpunit > /dev/null
23 
24        # $? is a shell variable which stores the return code from what we just ran
25        rc=$?
26        if [[ $rc != 0 ]] ; then
27            # A non-zero return code means an error occurred, so tell the user and exit
28            echo "phpunit failed on rev $newrev - push deniend. Run tests locally and confirm they pass before pushing"
29            exit $rc
30        fi
31    fi
32done
33 
34# Everything went OK so we can exit with a zero
35exit 0